【摘要】 为改良湘南红壤稻作区土壤和提高农民收入，研究通过6 a定位试验，以稻—冬闲为对照，分析比较了稻—萝卜、稻—蚕豆、稻—豌豆3种模式下的水稻产量、土壤理化性质和综合经济效益。结果表明：3种经济绿肥模式下的水稻产量均有显著提升，连续种植经济绿肥可以显著提高水稻的稻谷产量和地上部生物量；3种经济绿肥模式下土壤的pH值、有机质、全氮、碱解氮和速效钾含量没有显著变化，但全钾含量均显著高于对照模式；3种经济绿肥模式均能提高种植的经济效益，其中稻—蚕豆模式的综合经济效益最高。出于土壤培肥和经济效益综合考量，建议在南方红壤稻田区推广稻—蚕豆种植模式。更多还原

【Abstract】 To improve the soil fertility and increase farmers’ income in the ricecultivating area with red soil in Southern Hunan, a 6-year fixed-location experiment was carried out with three economic green manure cropping patterns of rice-radish(RR), rice-broad bean(RB), and rice-pea(RP), and rice-winter leisure was taken as the control(CK). The rice yield, soil physicochemical properties, and comprehensive economic benefits were compared between different patterns. The results showed that the three economic green manure cropping patterns all increased the rice yield.Continues economic green manure cropping significantly increased the grain yield and aboveground biomass of rice. The three green manure cropping patterns did not cause significant changes in soil pH value, organic matter, total nitrogen, available nitrogen, or available potassium, while they increased the total potassium compared with CK. All the three patterns increased the economic benefit, and the rice-broad bean pattern had the highest economic benefit. Considering both soil fertility and economic benefits, rice-broad bean was recommended as the planting pattern in the paddy fields of red soil in Southern Hunan.更多还原